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Finding the Fourth Proportional to 77,059.85, 115,579.32 and 20,903.57

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Solution

The fourth proportional to 77,059.85, 115,579.32 and 20,903.57 is: 31,352.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,059.85 : 115,579.32 = 20,903.57 : x
  2. Step 2: Convert to fraction form
    77,059.85/115,579.32 = 20,903.57/x
  3. Step 3: Cross multiply
    77,059.85x = 115,579.32 × 20,903.57
  4. Step 4: Simplify right side
    77,059.85x = 2,416,020,406.17
  5. Step 5: Solve for x
    x = 2,416,020,406.17/77,059.85
  6. Step 6: Final answer
    x = 31,352.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.